@ob2984 - Line 28 IS the $3600 you didn't receive. You were eligible for $7200 (2 children under 6 years old) less the $3600 you already received (and you verified in your bank statements) leaves the $3600 you are still due, which is Line 28..... Line 28 is part of the 'payments' section, so it was used to reduce what you otherwise would have owed.
no amendment required.
